Device for simultaneously moving double doors



UNITED STATES PATENT" Ormea.,

BERNHARD I; H. DE vnr AND J'oHN scHREiBER, or CHICAGO, iLLINoisQ Device FoR ysllvlunTAniou'sLYMOVING DouBLi-:DooRsL SPHCIPIGATIQN forming part of Lettera Patent No. 376,946, dated January 24, Aleem y Application filed/January 1l, 1887. Serial No. 224.073; (No model.)

To aZZvwtom/ it may concern:

Be it known vthat we, BERNHARD I. H. DE

VRY and JOHN SoHREiBHR, subjects ot' the Emperor of Germany, residing at Chicago, in the county of Cook and StateoflIllinois, have invented certain new and useful Improvements in Devices for Simultaneous Movement of Double Doors, of which the follow-ing is a specification, reference being had therein to the accompanying drawings.

This invention has for its object toprovide a device for double or two-wing sliding doors by which the movementimparted to one 4door will be transmittedjto the other door,Lo move simultaneously therewith either for closing or opening; and it principally consists' in the yattachment of sprocket-Wheels-oue l'or eachdoor-wing-and of a crossiliulehelt stretched over the two wh eels for transmitting-the Inovementfrom oneto the other; also,insuitablecon nections of such sprocket-wheels with either sliding door-wings, and in the novel combinations ol' parts for bringing about the desired result, all as will bemore fully hereinafter described, and specifically claimed.

In the accompanying drawings, Figure l represents au elevation .ot' the upper portion of sliding doors -with 'our deviceaLLached;

Fig. 2, a vertical cross-section on line 2 2 iu Fig. 1, and Fig. 3 a plan of the'same.

Corresponding letters iu the severalv figures of the drawings designate like parts. 4

A and A?. denote two-sliding doorssuspended each to Varaclr-bar, BVB', by two hangers, cf

those rack-bars B B'resting upon shafts c of aiged wheels C, that ride upon rails b. Apove each rack-bar BB is pivotally secured in the door-frame a shaft, d d, each having mounted f a gear-WheehD D', Vthe teeth of which mesh with the-teeth of the rack-bar B B,'and a sprocket-Wheel, E E', and over bothsprocketwheels, E E, is stretched an endless belt, F, composed partly of chain-links e, meshing with the teeth of such sprocket-Wheels, and of rods 45 bf,connecting these chains. `This endless belt Vis placed crosswise, for the purposevthat the movement of one wheel in one directionwill rotate the othery wheel in the opposite direction. The length ofjeach chain-link portion of the endless helt is proportional with the `distance or' reciprocationot the door, while the connecting-rods f, being always'on a straight-line pull, will more readily pass each .and vice versa, so that both doors'will be moved simultaneously either toward or'away from each other.

What we claim is r .f In a device for movingsliding doors,the combination, with the rack-bars secured to a moving f part of "the doors, of 'gearff wheels meshing intov said rack-bars, and sprocketwheels mounted on .thefsame shaft with the n gear-wheels and con'nectednto turn' or rotate together, anda cross belt or chainpengaging kthe sprocket-wheels, substantially as and for the` purpose setforth.- f

2. In a device 4for moving sliding do0rs',the

combination, with the traveler-frames and rack-bars secured thereto of the gear-wheels and sprocket-wheels mounted andconnectedy together ou the same shaft, and across-'belt composed of` the rods f and the links e, theI latterengaging the said sprocketlwheelsas set forth. v -y In testimony whereof we axonr signatures f in presence of two witnesses.

A BERNHARD.V I. H. yDE VRY.

Witnesses:

n NVM. H. Lofrz, u OTTO LUBKERT.

JOHN scHHmBHH.

5o motion'of sprocketwheelsE forthe extreme 

